/*
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * Kamailio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * Kamailio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "../../core/sr_module.h"
#include "../../core/mem/shm_mem.h"
#include "../../core/globals.h"
#include "../../core/config.h"
#include "../../core/pt.h"
#include "sl_stats.h"
#include "../../core/counters.h"
#include <strings.h>
#include <stdio.h>


static struct sl_stats **sl_stats;


static void add_sl_stats(struct sl_stats *t, struct sl_stats *i)
{
	enum reply_type rt;

	for(rt = 0; rt < RT_END; rt++) {
		t->err[rt] += i->err[rt];
		t->all_replies += i->err[rt];
	}
	t->failures += i->failures;
	t->filtered_acks += i->filtered_acks;
}


static const char *rpc_stats_doc[2] = {"Print reply statistics.", 0};

static void rpc_stats(rpc_t *rpc, void *c)
{
	void *st;
	struct sl_stats total;
	int p;
	int procs_no;

	memset(&total, 0, sizeof(struct sl_stats));
	if(dont_fork) {
		add_sl_stats(&total, &(*sl_stats)[0]);
	} else {
		procs_no = get_max_procs();
		for(p = 0; p < procs_no; p++)
			add_sl_stats(&total, &(*sl_stats)[p]);
	}

	if(rpc->add(c, "{", &st) < 0)
		return;

	rpc->struct_add(st, "jjj", "200", total.err[RT_200], "202",
			total.err[RT_202], "2xx", total.err[RT_2xx]);

	rpc->struct_add(st, "jjjj", "300", total.err[RT_300], "301",
			total.err[RT_301], "302", total.err[RT_302], "3xx",
			total.err[RT_3xx]);

	rpc->struct_add(st, "jjjjjjjj", "400", total.err[RT_400], "401",
			total.err[RT_401], "403", total.err[RT_403], "404",
			total.err[RT_404], "407", total.err[RT_407], "408",
			total.err[RT_408], "483", total.err[RT_483], "4xx",
			total.err[RT_4xx]);

	rpc->struct_add(
			st, "jj", "500", total.err[RT_500], "5xx", total.err[RT_5xx]);

	rpc->struct_add(st, "j", "6xx", total.err[RT_6xx]);
	rpc->struct_add(st, "j", "xxx", total.err[RT_xxx]);
}


void sl_stats_destroy(void)
{
	if(!sl_stats)
		return;
	if(*sl_stats)
		shm_free(*sl_stats);
	shm_free(sl_stats);
}

int init_sl_stats(void)
{
	sl_stats = (struct sl_stats **)shm_malloc(sizeof(struct sl_stats *));
	if(!sl_stats) {
		SHM_MEM_ERROR_FMT("for sl statistics\n");
		return -1;
	}
	*sl_stats = 0;
	return 0;
}


int init_sl_stats_child(void)
{
	int len;

	len = sizeof(struct sl_stats) * get_max_procs();
	*sl_stats = shm_malloc(len);
	if(*sl_stats == 0) {
		SHM_MEM_ERROR;
		shm_free(sl_stats);
		return -1;
	}
	memset(*sl_stats, 0, len);
	return 0;
}


void update_sl_failures(void)
{
	(*sl_stats)[process_no].failures++;
}

void update_sl_err_replies(void)
{
	(*sl_stats)[process_no].err_replies++;
}

void update_sl_filtered_acks(void)
{
	(*sl_stats)[process_no].filtered_acks++;
}

void update_sl_stats(int code)
{

	struct sl_stats *my_stats;

	my_stats = &(*sl_stats)[process_no];

	if(code >= 700 || code < 200) {
		my_stats->err[RT_xxx]++;
	} else if(code >= 600) {
		my_stats->err[RT_6xx]++;
	} else if(code >= 500) {
		switch(code) {
			case 500:
				my_stats->err[RT_500]++;
				break;
			default:
				my_stats->err[RT_5xx]++;
				break;
		}
	} else if(code >= 400) {
		switch(code) {
			case 400:
				my_stats->err[RT_400]++;
				break;
			case 401:
				my_stats->err[RT_401]++;
				break;
			case 403:
				my_stats->err[RT_403]++;
				break;
			case 404:
				my_stats->err[RT_404]++;
				break;
			case 407:
				my_stats->err[RT_407]++;
				break;
			case 408:
				my_stats->err[RT_408]++;
				break;
			case 483:
				my_stats->err[RT_483]++;
				break;
			default:
				my_stats->err[RT_4xx]++;
				break;
		}
	} else if(code >= 300) {
		switch(code) {
			case 300:
				my_stats->err[RT_300]++;
				break;
			case 301:
				my_stats->err[RT_301]++;
				break;
			case 302:
				my_stats->err[RT_302]++;
				break;
			default:
				my_stats->err[RT_3xx]++;
				break;
		}
	} else { /* 2xx */
		switch(code) {
			case 200:
				my_stats->err[RT_200]++;
				break;
			case 202:
				my_stats->err[RT_202]++;
				break;
			default:
				my_stats->err[RT_2xx]++;
				break;
		}
	}
}

rpc_export_t sl_rpc[] = {
		{"sl.stats", rpc_stats, rpc_stats_doc, 0}, {0, 0, 0, 0}};

#ifdef STATISTICS

/* k statistics */

unsigned long sl_stats_RT_1xx(void);
unsigned long sl_stats_RT_200(void);
unsigned long sl_stats_RT_202(void);
unsigned long sl_stats_RT_2xx(void);
unsigned long sl_stats_RT_300(void);
unsigned long sl_stats_RT_301(void);
unsigned long sl_stats_RT_302(void);
unsigned long sl_stats_RT_3xx(void);
unsigned long sl_stats_RT_400(void);
unsigned long sl_stats_RT_401(void);
unsigned long sl_stats_RT_403(void);
unsigned long sl_stats_RT_404(void);
unsigned long sl_stats_RT_407(void);
unsigned long sl_stats_RT_408(void);
unsigned long sl_stats_RT_483(void);
unsigned long sl_stats_RT_4xx(void);
unsigned long sl_stats_RT_500(void);
unsigned long sl_stats_RT_5xx(void);
unsigned long sl_stats_RT_6xx(void);
unsigned long sl_stats_RT_xxx(void);

unsigned long sl_stats_sent_rpls(void);
unsigned long sl_stats_sent_err_rpls(void);
unsigned long sl_stats_failures(void);
unsigned long sl_stats_rcv_acks(void);

static stat_export_t mod_stats[] = {
		{"1xx_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_1xx},
		{"200_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_200},
		{"202_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_202},
		{"2xx_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_2xx},
		{"300_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_300},
		{"301_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_301},
		{"302_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_302},
		{"3xx_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_3xx},
		{"400_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_400},
		{"401_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_401},
		{"403_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_403},
		{"404_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_404},
		{"407_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_407},
		{"408_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_408},
		{"483_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_483},
		{"4xx_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_4xx},
		{"500_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_500},
		{"5xx_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_5xx},
		{"6xx_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_6xx},
		{"xxx_replies", STAT_IS_FUNC, (stat_var **)sl_stats_RT_xxx},

		{"sent_replies", STAT_IS_FUNC, (stat_var **)sl_stats_sent_rpls},
		{"sent_err_replies", STAT_IS_FUNC, (stat_var **)sl_stats_sent_err_rpls},
		{"failures", STAT_IS_FUNC, (stat_var **)sl_stats_failures},
		{"received_ACKs", STAT_IS_FUNC, (stat_var **)sl_stats_rcv_acks},
		{0, 0, 0}};


static struct sl_stats _sl_stats_total;
static ticks_t _sl_stats_tm = 0;

static void sl_stats_update(void)
{
	int p;
	int procs_no;
	ticks_t t;

	t = get_ticks();
	if(t == _sl_stats_tm)
		return;
	_sl_stats_tm = t;

	memset(&_sl_stats_total, 0, sizeof(struct sl_stats));
	if(dont_fork) {
		add_sl_stats(&_sl_stats_total, &(*sl_stats)[0]);
	} else {
		procs_no = get_max_procs();
		for(p = 0; p < procs_no; p++)
			add_sl_stats(&_sl_stats_total, &(*sl_stats)[p]);
	}
}

unsigned long sl_stats_tx_1xx_rpls(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_1xx];
}

unsigned long sl_stats_RT_1xx(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_1xx];
}

unsigned long sl_stats_RT_200(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_200];
}

unsigned long sl_stats_RT_202(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_202];
}

unsigned long sl_stats_RT_2xx(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_2xx];
}

unsigned long sl_stats_RT_300(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_300];
}

unsigned long sl_stats_RT_301(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_301];
}

unsigned long sl_stats_RT_302(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_302];
}

unsigned long sl_stats_RT_3xx(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_3xx];
}

unsigned long sl_stats_RT_400(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_400];
}

unsigned long sl_stats_RT_401(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_401];
}

unsigned long sl_stats_RT_403(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_403];
}

unsigned long sl_stats_RT_404(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_404];
}

unsigned long sl_stats_RT_407(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_407];
}

unsigned long sl_stats_RT_408(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_408];
}

unsigned long sl_stats_RT_483(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_483];
}

unsigned long sl_stats_RT_4xx(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_4xx];
}

unsigned long sl_stats_RT_500(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_500];
}

unsigned long sl_stats_RT_5xx(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_5xx];
}

unsigned long sl_stats_RT_6xx(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_6xx];
}

unsigned long sl_stats_RT_xxx(void)
{
	sl_stats_update();
	return _sl_stats_total.err[RT_xxx];
}


unsigned long sl_stats_sent_rpls(void)
{
	sl_stats_update();
	return _sl_stats_total.all_replies;
}

unsigned long sl_stats_sent_err_rpls(void)
{
	sl_stats_update();
	return _sl_stats_total.err_replies;
}

unsigned long sl_stats_failures(void)
{
	sl_stats_update();
	return _sl_stats_total.failures;
}

unsigned long sl_stats_rcv_acks(void)
{
	sl_stats_update();
	return _sl_stats_total.filtered_acks;
}

#endif

int sl_register_kstats(void)
{
#ifdef STATISTICS
	/* register statistics */
	if(register_module_stats("sl", mod_stats) != 0) {
		LM_ERR("failed to register statistics\n");
		return -1;
	}
#endif
	return 0;
}
